A137046 Numbers k such that k and k^2 use only the digits 1, 4, 5, 6 and 7.

1, 4, 74, 76, 746, 6454, 6754, 7466, 64476, 67466, 67576, 74476, 74616, 644574, 664166, 667576, 675771, 717466, 751776, 4176776, 6455746, 6746454, 7151616, 7174616, 7467574, 64154154, 64556654, 66461754, 66751454, 67651616, 67651716, 74474476, 417751666, 664615766, 664647776, 667567716, 674174766, 674667116, 715167576, 717464116

Offset

1,2

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..231

J. Wellons, Tables of Shared Digits [archived]

Example

745764545654154^2 = 556164757554746745767777455716.

Crossrefs

Sequence in context: A222767 A353740 A090212 * A104335 A156494 A232371

Adjacent sequences: A137043 A137044 A137045 * A137047 A137048 A137049

Keyword

base,nonn

Author

Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008

Status

approved